代码如下：

    /**
     * 把json转换成Record对象
     * @Title jsonToRecord
     * @Description TODO  
     * @param rec
     * @param columnName
     * @return 
     * @since 2017年11月8日 上午11:39:36
     */
    @SuppressWarnings("unchecked")
    public static Record jsonToRecord(String jsonStr,String columnName){
		Map<String, Object> columns= com.jfinal.json.FastJson.getJson().parse(jsonStr, Map.class);//这个异常
//    	Map<String, Object> columns= JSON.parseObject(jsonStr, Map.class);//把FastJson里面封装的提出来后就不会报错
		Record record=new Record().setColumns(columns);
		return record;
	}

异常问题如下：

[ERROR]-[Thread: qtp667346055-22 - /weapons]-[com.jfinal.core.ActionHandler.handle()]: /weapons
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
	at com.jfinal.aop.Invocation.invoke(Invocation.java:87)
	at com.softisland.common.Interceptors.LeftMenuInterceptors.intercept(LeftMenuInterceptors.java:24)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:67)
	at com.jfinal.plugin.activerecord.tx.TxByActionKeys.intercept(TxByActionKeys.java:57)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:67)
	at com.jfinal.plugin.activerecord.tx.TxByMethods.intercept(TxByMethods.java:57)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:67)
	at com.jfinal.plugin.activerecord.tx.TxByMethodRegex.intercept(TxByMethodRegex.java:61)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:67)
	at com.jfinal.plugin.activerecord.tx.TxByActionKeyRegex.intercept(TxByActionKeyRegex.java:61)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:67)
	at com.jfinal.ext.interceptor.SessionInViewInterceptor.intercept(SessionInViewInterceptor.java:44)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:67)
	at com.softisland.common.Interceptors.LeftMenuInterceptors.intercept(LeftMenuInterceptors.java:24)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:67)
	at com.softisland.common.Interceptors.LoginInterceptors.intercept(LoginInterceptors.java:20)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:67)
	at com.jfinal.core.ActionHandler.handle(ActionHandler.java:83)
	at com.jfinal.ext.handler.ContextPathHandler.handle(ContextPathHandler.java:48)
	at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:73)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1307)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:453)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:560)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1072)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:382)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1006)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
	at org.eclipse.jetty.server.Server.handle(Server.java:361)
	at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:485)
	at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:926)
	at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:988)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:635)
	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
	at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:73)
	... 42 more
Caused by: java.lang.NoSuchMethodError: com.alibaba.fastjson.serializer.SerializeConfig.put(Ljava/lang/reflect/Type;Lcom/alibaba/fastjson/serializer/ObjectSerializer;)Z
	at com.jfinal.json.FastJson.<clinit>(FastJson.java:31)
	at com.softisland.utils.Constant.jsonToRecord(Constant.java:76)
	at com.softisland.business.weapons.service.BusinessWeaponsService.reloadRecord(BusinessWeaponsService.java:58)
	at com.softisland.business.weapons.service.BusinessWeaponsService.getListByPage(BusinessWeaponsService.java:38)
	at com.softisland.business.weapons.controller.BusinessWeaponsController.index(BusinessWeaponsController.java:60)
	... 47 more

我在其他项目上使用的同样的方法，同样的json就不会报错，各种清理，各种干就是不对，始终找不到原因，最后无赖；

解决办法就是：只有把jfinal里面封装的方法实现的代码复制出来后直接使用就不会报错了；求讲解原因@jfinal